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openwrt-xburst/package/firewall/files
jow 0874d00715 firewall: allow local redirection of ports
Allow a redirect like:

config redirect
        option src 'wan'
        option dest 'lan'
        option src_dport '22001'
        option dest_port '22'
        option proto 'tcp'

note the absence of the "dest_ip" field, meaning to terminate the connection on the firewall itself.

This patch makes three changes:

(1) moves the conntrack module into the conntrack package (but not any of the conntrack_* helpers).
(2) fixes a bug where the wrong table is used when the "dest_ip" field is absent.
(3) accepts incoming connections on the destination port on the input_ZONE table, but only for DNATted
    connections.

In the above example,

ssh -p 22 root@myrouter

would fail from the outside, but:

ssh -p 22001 root@myrouter

would succeed.  This is handy if:

(1) you want to avoid ssh probes on your router, or
(2) you want to redirect incoming connections on port 22 to some machine inside your firewall, but
    still want to allow firewall access from outside.

Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@26617 3c298f89-4303-0410-b956-a3cf2f4a3e73
2011-04-12 20:03:59 +00:00
..
bin [package] firewall: 2010-05-01 18:22:01 +00:00
lib firewall: allow local redirection of ports 2011-04-12 20:03:59 +00:00
firewall.config [package] firewall: don't apply default udp/68 rule to ip6tables 2010-05-19 21:37:12 +00:00
firewall.hotplug [package] firewall: run ifdown hotplug events synchronized, fixes a racecondition on "ifup iface" when ifdown and ifup events are delivered with a small dealy 2010-09-15 01:53:36 +00:00
firewall.init [package] firewall (#7355) 2010-05-19 00:50:14 +00:00
firewall.upgrade Keep firewall.user during sysupgrades 2011-03-20 00:57:47 +00:00
firewall.user [package] firewall: enable /etc/firewall.user by default and install sample firewall.user file 2009-04-12 22:38:34 +00:00
reflection.hotplug [package] firewall: also establish forward rules when setting up nat reflection, back out early if reflection is disabled 2010-10-03 18:11:59 +00:00